import pandas as pd
from pandas.plotting import register_matplotlib_converters
import numpy as np
import matplotlib.pyplot as plt


reader = pd.read_csv('d:\\py\\data\\subscribers.csv')
datay=reader['Subscribers']
xa = list(range(1,len(datay)+1))

plt.scatter(xa,datay,s=50,c='r',marker='o',alpha =0.5)
plt.title('一月份微信公众号订阅量散点图',family ='kaiti',size=20, color ='c',loc='center') 
plt.savefig("d:\\py\\一月份微信公众号订阅量散点图")  
plt.show()